Fashionable area to work in city (7)
I believe the answer is:
chicago
'city' is the definition.
(Chicago is an example)
'fashionable area to work' is the wordplay.
'fashionable' becomes 'chic' (I've seen this before).
'area' becomes 'a' (maths abbreviation).
'to work' becomes 'go' ('go' can be a synonym of 'work').
'chic'+'a'+'go'='CHICAGO'
'in' is the link.
(Other definitions for chicago that I've seen before include "City on Lake Michigan" , "Type of bridge" , "US city - musical featuring All That Jazz" , "US city, original home of the skyscraper" , "Musical (in Illinois?)" .)